<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
		$username = strtolower($this->username);
		$manager = Manager::model()->find('user_name=:username',array(':username'=>$username));
		if($manager === null)
			$this->errorCode=self::ERROR_USERNAME_INVALID;
		else if($manager->password !== md5($this->password))
			$this->errorCode=self::ERROR_PASSWORD_INVALID;
		else
			$this->errorCode=self::ERROR_NONE;
		return !$this->errorCode;
	}
	
	/**
	 * Date:2012-06-05
	 * function:重写getId方法  让其返回相应的ID值而不是username
	 * */
	
	function getId()
	{
		$username = $this->username;
		$password = md5($this->password);
		$criteria =new CDbCriteria;
		$criteria->select = 'id';
		$criteria->condition = 'user_name=:username';
		$criteria->condition = 'password=:password';
		$criteria->params=array(':username'=>$username);
		$criteria->params=array(':password'=>$password);
		
		$manager = Manager::model()->find($criteria);
		if($manager !== null){
			return $manager->id;
		}
		return 0;
	}
}